Forughirad A, Bahrami A, Farhadi K, Fathi Azerbaijani A and Kazemi F, “Comparative of Natural Zeolite – Clinoptilolite Elimination of Metal ions/Especially Cu (II) With D-Penicillamine from Biological Environments” (2021) 36 Rudarsko-geološko-naftni zbornik accessed May 7, 2024